I have one confusion when in question we knw tht speed is getting reduced so should we put the sign of acceleration negative?? For ex in this question:- A car moving in a straight line at 30 m/s slows uniformly to a speed of 10 m/s in 5 sec. Determine:
(a)the acceleration of the car,
(b)displacement in the third second. When I take the sign of “a” negative the magnitude of a is coming out be positive and when I put the value of “a”(+ve) in b part i get wrong answer of b part
I have one confusion when in question we knw tht speed is getting reduced so should we put the sign of acceleration negative?? For ex in this question:-
A car moving in a straight line at 30 m/s slows uniformly to a speed of 10 m/s in 5 sec. Determine:
(a)the acceleration of the car,
(b)displacement in the third second. When I take the sign of “a” negative the magnitude of a is coming out be positive and when I put the value of “a”(+ve) in b part i get wrong answer of b part